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Deploying to Heroku, in One Click

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devops Javajava Rultorrultor

There were a few articles already about our usage of Rultor for automating continuous delivery cycles of Java and Ruby projects, including RubyGems, CloudBees and Maven Central.

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This one describes how Heroku deployment can be automated. When I need to deploy a new version of an Aintshy web application, all I do is create one message in a GitHub ticket. I just say @rultor release 0.1.4 and version 0.1.4 gets deployed to Heroku. See GitHub ticket #5.

You can do the same, with the help of Rultor.com, a free hosted DevOps assistant.

Create a new project at Heroku.com.

Then install their command line tool-belt.

You should authenticate your public SSH key at Heroku, using their command line tool-belt. The process is explained here, but it is not much of a process. You just run heroku login and enter your login credentials. As a result, you will get your existing key (located at ~/.ssh/id_rsa.pub) authenticated by Heroku.

If you didn’t have the key before, it will be created automatically.

Now, encrypt id_rsa and id_rsa.pub (they are in the ~/.ssh directory) with a rultor remote:

$ gem install rultor
$ rultor encrypt -p me/test id_rsa
$ rultor encrypt -p me/test id_rsa.pub

Instead of me/test use the name of your GitHub project.

You will get two new files id_rsa.asc and id_rsa.pub.asc. Add them to the root directory of your project, commit and push. These files contain your secret information, but only the Rultor server can decrypt them.

Create a .rultor.yml file in the root directory of your project (reference page explains this format in detail):

decrypt:
  id_rsa: "repo/id_rsa.asc"
  id_rsa.pub: "repo/id_rsa.pub.asc"
release:
  script: |
    mvn versions:set "-DnewVersion=${tag}"
    git commit -am "${tag}"
    mvn clean install -Pqulice --errors
    git remote add heroku git@heroku.com:aintshy.git
    mkdir ~/.ssh
    mv ../id_rsa ../id_rsa.pub ~/.ssh
    chmod -R 600 ~/.ssh/*
    echo -e \
      "Host *\n  StrictHostKeyChecking no\n  UserKnownHostsFile=/dev/null" \
      > ~/.ssh/config
    git push -f heroku $(git symbolic-ref --short HEAD):master

You can compare your file with live Rultor configuration of aintshy/hub.

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Now it’s time to see how it all works. Create a new ticket in the GitHub issue tracker, and post something like this into it (read more about Rultor commands):

@rultor release, tag is `0.1`

You will get a response in a few seconds. The rest will be done by Rultor.

Enjoy!

BTW, if something doesn’t work as I’ve explained, don’t hesitate to submit a ticket to the Rultor issue tracker. I will try to help you.

PS. I would also recommend to versionalize artifacts through MANIFEST.MF and use jcabi-manifests to read them later.

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